DOI: 10.1007/s10533-017-0298-9
Scopus记录号: 2-s2.0-85012864680
论文题名: Recovery from acidification alters concentrations and fluxes of solutes from Czech catchments
作者: Oulehle F. ; Chuman T. ; Hruška J. ; Krám P. ; McDowell W.H. ; Myška O. ; Navrátil T. ; Tesař M.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 132, 期: 3 起始页码: 251
结束页码: 272
语种: 英语
英文关键词: Acidification
; Carbon
; Eutrophication
; Forest
; Nitrogen
; Phosphorus
; Stream
Scopus关键词: acidification
; atmospheric deposition
; biogeochemistry
; carbon cycle
; concentration (composition)
; dissolved inorganic nitrogen
; dissolved organic carbon
; eutrophication
; forest floor
; forested catchment
; nitrogen cycle
; phosphorus cycle
; solute transport
; streamwater
英文摘要: Changes in atmospheric deposition, stream water chemistry, and solute fluxes were assessed across 15 small forested catchments. Dramatic changes in atmospheric deposition have occurred over the last three decades, including a 70% reduction in sulphur (S) deposition. These changes in atmospheric inputs have been associated with expected changes in levels of acidity, sulphate and base cations in streams. Soil retention of S appeared to partially explain rates of chemical recovery. In addition to these changes in acid–base chemistry we also observed unexpected changes in nitrogen (N) biogeochemistry and nutrient stoichiometry of stream water, including decreased stream N concentrations. Among all catchments the average flux of dissolved inorganic nitrogen (DIN) was best predicted by average runoff, soil chemistry (forest floor C/N) and levels of acid deposition (both S and N). The rate of change in stream DIN flux, however, was much more closely correlated with reductions in rates of S deposition rather than those of DIN. Unlike DIN fluxes, the average concentrations as well as the rates of decline in streamwater nitrate (NO3) concentration over time were tightly linked to stream dissolved organic carbon/dissolved organic nitrogen ratios DOC/DON and DON/TP rather than catchment characteristics. Declines in phosphorus adsorption with increasing soil pH appear to contribute to the relationship between C, N, and P in our study catchments. Our observations suggest that catchment P availability and its alteration due to environmental changes (e.g. acidification) might have profound effects on N cycling and catchment N retention that have been largely unrecognized. © 2017, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83300
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Czech Geological Survey, Klárov 3, Prague, Czech Republic; Global Change Research Institute, AS CR, Bělidla 986/4a, Brno, Czech Republic; Department of Natural Resources and the Environment, University of New Hampshire, Durham, NH, United States; Institute of Geology, AS CR, Rozvojová 269, Prague, Czech Republic; Institute of Hydrodynamics, AS CR, Pod Paťankou 30/5, Prague, Czech Republic
Recommended Citation:
Oulehle F.,Chuman T.,Hruška J.,et al. Recovery from acidification alters concentrations and fluxes of solutes from Czech catchments[J]. Biogeochemistry,2017-01-01,132(3)